This system enables website owners and developers to implement lightweight, open-source user interaction and engagement tracking without relying on commercial analytics platforms, by utilizing a single script tag that collects data directly in visitors' browsers and sends it securely to their own backend servers. Its key features include real-time heatmaps, scroll depth measurement, rage click detection, gaze tracking via webcam, and customizable data endpoints such as databases or spreadsheets, all with zero dependencies, no server requirements, and complete control over the collected data. Designed for digital analysts, product managers, web developers, and privacy-conscious organizations, it solves problems related to user behavior insight, privacy compliance, cost-effective analytics, and simplified integration while avoiding data leakage or vendor lock-in.